Electric signaling apparatus



(No Model.)

E. G. METTLER. ELECTRIC SIGNALING APPARATUS.

Patented Oct. 13, 1891.

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MDYNAMO No-q Gwi/tweooao y.. 1S. w wwa NITED STATES PATENT OFFICE.

EUGENE Gr. METTLER, OF INDIANAPOLIS, INDIANA, ASSIGNOR, BY DIRECT ANDvMESNE ASSIGNMENTS, OF ONE-HALF TO FREDERICK L. MCGAI-IAN, OF SAME PLACE,AND HENRY O. BAILEY, OF EDINBURG, INDIANA.

ELECTRIC SIGNALING APPARATUS.

SPECIFICATION forming part of Letters Patent No. 461,104, dated October13, 1891.

Serial No. 368,228. (No model.)

To all whom t 17m/y concern,.-

Be it known that I, EUGENE G. METTLEE, of Indianapolis, county ofMarion, and State of Indiana, have invented certain new and usefulImprovements in Electric Signaling Apparatus; and I do hereby declarethat the ,following is a full, clear, and exact description thereof,reference being had to the accompanying drawings, in which like lettersxo refer to like parts.

My invention relates to vimprovements in the construction of electricsignaling apparatus, and is especiallyintended to give notice of thebreaking of Wires arising from overheating or burning outof any of thewires of a series of dynamos in an electric station, and will beunderstood from the following description.

In the drawings, Figure lis a front view of 2o a series of coils set inthe circuits of the dynamos connected to a signaling-whistle. Fig. 2 isa side view, the coil being in section, showing the connection of theweighted core to the whistle, this view being on an enlarged z 5 scale.

In Fig. 1 I show a series of four coils supported upon a shelf orbracket connected to the wall or any suitable place, these coils beingconnected to the main-circuit wires of a 3o series of dynamos numberedl, 2, 3, and 4. The cores c of these coils are preferably weighted orenlarged at the lower end, and tags are attached indicating the numberof the dynamo to which the 'coil is connected.

The cores are connected by cords passing over sheave-pulleys p, allleading to a whistle tu, which may be located in any convenientposition, being connected bya steam-pipe to the boiler. The whistle isprovided with the or- 40 dinary valve, having an arm d, to which thecord leading to the core is connected, as shown in Fig. 2.

My device operates as follows: In an ordinary electric-light or powerstation a number of dynamos are more or less in constant use,

and it often happens that one of these dynamos becomes disabled byoverheating or by some accident happening to it, which would break theconnection and open the circuit,

which would short-circuit the dynamo and in- 5o terrupt the maincurrent. The main-line wires lead directly through the coils to thedynamos, and of course when any circuit is thus interrupted it destroysthe magnetism in the coil, and this allows the weighted core to drop,and this pulls the cord and opens the valve, sounding the alarm upon thewhistle, and by looking at the tags the engineer in charge can tell atonce which dynamo is affected. These dynamosbeingindependently 6oconnected through the coils to the whistle, the interruption of one onlydrops the tag upon its particular core, and if another should becomeaffected it would drop its core, and so on in turn, and if all thedynamos were affected all the-cores would be dropped and the tags wouldindicate the disturbance or interruption of the circuit. The brushesoften become bent and dust, cinders, or ashes collect upon them, so asto prevent the free passage 7o of the current, and the resistance thenbecomes so great that the magnetism of the coil is affected, the core isdropped, the whistle is sounded, and the engineer is notified. Of coursethe whistle is located so as to he heard 7 5 readily in any part of thebuilding, and the engineer can at once direct his attention to thedynamo affected and by prompt action prevent its burning out.

The weight of the core is such that when 8o dropped it will not again bedrawn up either by the force of the current alone or together with thepressure from the steam-whistle, and, as a consequence, when the dynamohas been repaired the engineer lifts the weight, pushing it up and intothe coil by hand, and the force of the current will then hold it inplace.

That I claim as my invention, and desire to secure by Letters Patent, isthe following:

l. An electric-signaling apparatus compris- 9: ing an electro-magnet setin the main circuit between the dynamo and the mechanism to be operatedupon, the core of such magnet weighted and provided with a numbering-tagat its lower end, its upper end connected to a 'steam-whistle, thelatter suitably connected to the steam-supply, all combinedsubstantially as shown and described.

2. An electric signaling device comprising Whistle and the force of thecurrent in the 1o an electro-magnet set in the main circuit between thedynamo and the light or motor, the core of such coil provided With anindicatingtag at its lower end and connected at its upper end by a cordto a steam-Whistle, such core normally held up bythe force of thecurrent and Weighted, so that When dropped it overbalances theresistance of the steam in the coils, substantially as shown anddescribed.

In Witnesswhereof I have hereunto set my hand this Sth day of October,1890.

EUGENE G. METTLER.

Witnesses:

C. P. JACOBS, A H. D. NEALY.

